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Introduction Research in the area of ecofriendly and biodegradable packaging films is currently of prime interest due to their advantages in protecting foodstuffs and reducing environmental pollution by reducing petroleum-based plastics packaging materials currently in use.
The functional properties of chitosan films are improved when chitosan is combined with other film-forming materials.
Experimental Section Materials Chitosan (degree of deacetylation of 85%) with molecular weight of about 106 was purchased from Jinan haidebei Marine Bioengineering Co., Ltd.
Chinnan: LWT - Food Science and Technology Vol. 41 (2008), P. 1633 [10] F.J.
Del Nobile: Journal of Food Engineering Vol. 88 (2008), P. 159

Fabrication and characterization of transparent ZnO film based resistive switching devices Hongxia li1,a, Dongdong Shen1, Weiqing Ke1, Junhua Xi1,2, Zhe Kong1, and Zhenguo Ji1,b 1 Lab of Electronic Materials and Devices, Hangzhou Dianzi University, Hangzhou 310018, China 2State Key Lab of Silicon Materials, Zhejiang University, Hangzhou 310027, China ahxli@hdu.edu.cn, b jizg@hdu.edu.cn (corresponding author) Keywords: transparent film; resistive switching; magnetron sputtering; transmittance; endurance Abstract.
According to the literatures, various materials have been reported to show resistance switching behaviors.
As a wide band gap material (3.37eV), ZnO has high transmittance in the visible range.
Acknowledgements The financial aids of the Chinese National Natural Science Foundation（grant No. 61072015）, Zhejiang Provincial Natural Science Foundation of China (grant No.
Tsai, Low-power switching of nonvolatile resistive memory using hafnium oxide, Japanese Journal of Applied Physics Part 1-Regular Papers Brief Communications & Review Papers. 46(2007) 2175-2179

At present, nano-scale materials have emerged up as novel antimicrobial agents owing to their high ratio of surface area to volume, and unique chemical and physical properties [2-3].
Materials and methods Materials and Preparation of the Nano-Silver.
Materials Transactions, 46 (2005),p.1636 [5] N.
World Journal of Science and Technology , 7(2011), p.49 [6] M.K.
Nor, Solid State Sciences, 11(2009), p.1621 [8] V.

Besides, polythiophene/metal oxide, polypyrrole/SnO2[8], CuPc/H2PtCl6 and other hybrid materials emerged gradually.
For H2S gas sensors, searching for better sensitive materials is a good direction.
There are many factors to contribute to the attenuation of response, including dust, water vapor and other materials adsorbed to the surface of the film, which affected the film’s adsorption of gas molecules.
Preparation and gas sensitivity study of polypyrrole/tin oxide hybrid material, Chin J Inorg Chem, 2005, 21:977-981
Detection of NH3 by quartz crystal microbalance with SnxNiy coating, Journal of Optoelectronics and Advanced Materlal, 2010, 12: 1957-1961.

The characterization results present information to determine the techniques and materials used for the ceramic production during the medieval and after medieval period.
The archaeological evidences such as kiln and kiln materials to be found in 2001 have been point out the existence of ceramic production in that region.
Results were used to extract information about processing condition, materials used during the ceramic production.
Kirch: Ceramics in Archaeology in International Encyclopedia of the Social & Behavioral Sciences (Elsevier Science Ltd., USA 2001)
Zambonin: Journal of cultural Heritage vol.3 (2002), p. 177

He proposed a proportionality coefficient of 0.33 whatever the materials.
The effect of the contact geometry and the nature of the contacting materials are dominating factors
These two challenges are close to a precise knowledge of structural materials.
A third body always separates the contacting materials and usually imposes a dominating action.
Education and Science, HMSO

The Risk Management of the owner in the Bidding Process under the 2013 edition of the Valuation Mode of Bill of Engineering Quantity Guo Zhanglin1,a,Jia Ruihong2,b 1 Department of civil engineering,North China Institute of Science and Technology,East Yanjiao,Beijing,China,101601 2 College of Economics and Management, Hebei University of Engineering,Handan, Hebei ,056038 aemail: gg_zz_ll@163.com, bemail:tsqyjrh8725@126.com Keywords: owner;valuation risk;pricing standard; risk control Abstract.
And in this article we propose some specific measures of the risk control about the imperfect of construction drawing design,the quatity problems of tender documents,unbalanced quote of the bidders,the price changing of the building materials and equipments and various rates of change in order to achieve active control risk and avoid exceeding the cost and provide a theoretical basis for the owner (or the tender agent) to bid.
(4) The price changing of the building materials and equipments Construction project usually experience more than one year, during this time,the price of steel, cement and necessary equipment of the engineering will be faced with the trend of rising prices.Once the price increases, the owners must bear these extra costs,and in other words it increase the engineering investments and estimates, especially when we start the job under the condition of a fixed-price contract,the risk which is caused by the rising prices will give more pressure on the owners.
In reality, if  the price is  high or the price of materials or equipment may be greater volatility,the construction unit can make some relative measures, such as we can make a uniform price for a material.And we can list the price in the bill of engineering quantity,which not only can play a role in contrast but also can be used as a basis for settlement to stable the total project cost
Journal of Yangtze River Scientific Research Institute[J].2013,30(1),86-89

Laterite has been widely utilized due to its availability, durability, and cost-effectiveness compared to other construction materials.
However, the geotechnical properties and suitability of these laterite materials can vary significantly across different regions within the states due to variations in parent rock types, weathering conditions, and environmental factors.
Materials and Method 2.1.
O., and Osinubi, K. (2021) “Effect of iron ore tailings on the plasticity and compaction properties of selected tropical soils”, IOP Conference Series: Materials Science and Engineering.
Construction and Building Materials, 14(6), 311-315.https://doi.org/10.1016/S0950-0618(00)00033-7

Zakaria, Burst strength of carbon fibre reinforced polyethylene strip pipeline repair system - A numerical and experimental approach, Journal of Composite Materials. 49, 6 (2015) 749-756. https://doi.org/10.1177/0021998314525652 [8] S.R.
El-Raghy, Corrosion characteristics of ASTM A106 grade B carbon steel pipelines exposed to sodium sulfate solutions, Materials Performance and Characterization, 7, 1 (2018) 480-494
Sosa, Modelling steel corrosion damage in soil environment, Corrosion Science, 51 (2009) 2628-2638
Parinov (Eds.), Non-destructive Testing and Repair of Pipelines, Engineering Materials, Springer, Switzland, (2017) pp. 387-398. https://doi.org/10.1007/978-3-319-56579-8_24 [16] N.A.
Banea, S. de Barros, Composite repair system for corroded metallic pipelines: an overview of recent developments and modelling, Journal of Marine Science and Technology, (2019). https://doi.org/10.1007/s00773-019-00696-3 [21] A.G.

Acknowledgement This work is supported by a research grant provided by the National Natural Science Funds of China (71271105) and the Ministry of Education of Humanities and Social Science Research Project Fund of China (12YJA630036).
Journal of Intelligent Manufacturing. 2011, 22:533–544
Journal of Intelligent Manufacturing. 2010, 21(4):471-485
Applied Mechanics and Materials.2012 (110-116):3938-3946
European Journal of Operational Research.2010, 206:509-521.